Application of time reversal approach for focusing of Lamb waves

Abstract

In this article an application of ultrasonic time-reversal approach for localization and non-destructive characterization of defects by means of Lamb waves is investigated. The feature of a time-reversed wave field to focus on its source by overcoming dispersion and diffraction effects allows use it for adaptive focusing of Lamb waves. The study of transducers array configuration was performed and showed how it influences wave field focusing patterns in a steel plate.